CVS commit: src/sys

["matthew green" <mrg%netbsd.org@localhost>]

Module Name:    src
Committed By:   mrg
Date:           Sun Jan 12 09:29:18 UTC 2020

Modified Files:
        src/sys/arch/aarch64/aarch64: cpu.c cpufunc.c locore.S
        src/sys/arch/aarch64/include: cpu.h cpufunc.h
        src/sys/arch/arm/fdt: cpu_fdt.c
        src/sys/kern: subr_cpu.c

Log Message:
provide some semblance of valid cpu topology for big.little systems.

while attaching cpus, if the FDT provides "capacity-dmips-mhz" track
the fastest set, and call cpu_topology_set() with slow=true for any
cpus that are not the fastest.

bug fix for cpu_topology_set(): actually set ci_is_slow for slow cpus.

with this change, and -current's recent scheduler changes, this means
that long running processes run on the faster cores.  on RK3399 based
systems, i am seeing 20-50% speed ups for many tasks.

XXX: all this can be made common with armv7 big.little.


To generate a diff of this commit:
cvs rdiff -u -r1.32 -r1.33 src/sys/arch/aarch64/aarch64/cpu.c
cvs rdiff -u -r1.13 -r1.14 src/sys/arch/aarch64/aarch64/cpufunc.c
cvs rdiff -u -r1.50 -r1.51 src/sys/arch/aarch64/aarch64/locore.S
cvs rdiff -u -r1.17 -r1.18 src/sys/arch/aarch64/include/cpu.h
cvs rdiff -u -r1.9 -r1.10 src/sys/arch/aarch64/include/cpufunc.h
cvs rdiff -u -r1.30 -r1.31 src/sys/arch/arm/fdt/cpu_fdt.c
cvs rdiff -u -r1.6 -r1.7 src/sys/kern/subr_cpu.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.